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TheMathAsker

  • one year ago

Estimate the area of the circle, use 22/7 for π

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  1. TheMathAsker
    • one year ago
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  2. Sachintha
    • one year ago
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    Use the equation \[2\pi r^2\]

  3. anonymous
    • one year ago
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    Area of a circle is \[\large A=\pi \times r^{2}\] Right now we have the diameter, which is 28. To get the radius, we have to divide the diameter by 2. So \[\large \frac{28}{2}=r\] Once you get the r tell me and we'll plug it into the area of a circle formula :)

  4. anonymous
    • one year ago
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    @Sachintha it looks like you combined the circumference formula and area formula together.

  5. Sachintha
    • one year ago
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    Sorry my mistake.. :D

  6. TheMathAsker
    • one year ago
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    So 28 / 2 = 14

  7. Sachintha
    • one year ago
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    @TheMathAsker Give it a try as @LegendarySadist said.

  8. anonymous
    • one year ago
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    Right. And since we're using 22/7 for pi, it would look like this \[\large A=\frac{22}{7} \times 14^{2}\] The next step is to find 14^2

  9. TheMathAsker
    • one year ago
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    Its 196?

  10. anonymous
    • one year ago
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    Yep that would be it, good job :). So now we are gonna multiply 196 by 22/7. Which will look like this \[\large A=\frac{22*196}{7}\] So our next step is to find 196*22

  11. TheMathAsker
    • one year ago
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    That would be 4,312

  12. anonymous
    • one year ago
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    Right, good job. Now we have to divide 4312 by 7. Which will look like this \[\large A=\frac{4312}{7}\] This is gonna be our final step :)

  13. TheMathAsker
    • one year ago
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    616?

  14. anonymous
    • one year ago
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    Yep, that would be our answer, so \[\large A=616\] or more specifically \[\large A=616cm^{2}\]

  15. TheMathAsker
    • one year ago
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    Thank you so much !!!!!! c:

  16. anonymous
    • one year ago
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    \[\huge \color{aqua}N\color{fuchsia}o \space \color{lime}P \color{orange}r \color{blue}o \color{maroon}b \color{red}l \color{olive}e \color{purple}m \ddot\smile \]

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